<template>
   <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图 -->
    <el-card>
        <!-- jian警告 -->
        <el-alert show-icon title="注意: 只允许为第三级分类设置相关参数" type="warning" :closable="false"></el-alert>
        <!-- 选择商品分类区域 -->
        <el-row class="cat_opt">
            <el-col>
                <span>选择商品分类</span>
                <!-- selectedCateKeys数据选择框 -->
                <el-cascader
                    expand-trigger="hover"
                    :options="catelist"
                    :props="cateProps"
                    v-model="selectedCateKeys"
                    @change="handleChange"
                    clearable>
                </el-cascader>
            </el-col>
        </el-row>


        <!-- tab页签区域 -->
        <el-tabs v-model="activeName" @tab-click="handleTabClick">
         <el-tab-pane label="用户管理" name="many">
             <el-button type="primary" size="mini"
             :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
             <!-- 动态添加表格参数 -->
             <el-table :data="manyTableData" border stripe>
                 <el-table-column type="expand">
                     <template slot-scope="scope">
                         <!-- xunhuan渲染tag标签 -->
                         <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                         <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.native="handleInputConfirm(scope.row)"
                        @blur="handleInputConfirm(scope.row)"
                        >
                        </el-input>
                        <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                     </template>
                 </el-table-column>
                 <el-table-column type="index"></el-table-column>
                 <el-table-column label="参数名称" prop="attr_name">
                 </el-table-column>
                 <el-table-column label="操作">
                     <template slot-scope="scope">
                        <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                        <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                     </template>
                 </el-table-column>
             </el-table>
         </el-tab-pane>
         <el-tab-pane label="配置管理" name="only">
             <el-button type="primary" size="mini"
              :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
              <!-- 静态添加属性表格 -->
              <el-table :data="onlyTableData" border stripe>
                  <el-table-column type="expand">
                     <template slot-scope="scope">
                         <!-- xunhuan渲染tag标签 -->
                         <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                         <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.native="handleInputConfirm(scope.row)"
                        @blur="handleInputConfirm(scope.row)"
                        >
                        </el-input>
                        <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                     </template>
                 </el-table-column>
                 <el-table-column type="index"></el-table-column>
                 <el-table-column label="属性名称" prop="attr_name">
                 </el-table-column>
                 <el-table-column label="操作">
                     <template slot-scope="scope">
                        <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                        <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                     </template>
                 </el-table-column>
             </el-table>
         </el-tab-pane>
        </el-tabs>
    </el-card>

     <!-- 添加参数的对话框 -->
     <el-dialog
        :title="'添加' + titleText"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed">
        <!-- 添加参数对话框 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="addForm.attr_name"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
     </el-dialog>

<!-- 修改参数的对话框 -->
     <el-dialog
        :title="'添加' + titleText"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed">
        <!-- 添加参数对话框 -->
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="editForm.attr_name"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
     </el-dialog>

  </div>
</template>

<script>
export default {
 data(){
     return {
         catelist:[],
         cateProps:{
             value:'cat_id',
             label:'cat_name',
             children:'children',
         },
         selectedCateKeys:[],
         activeName:'many',
         manyTableData:[],
         onlyTableData:[],
         addDialogVisible:false,
         addForm:{
             attr_name:''
         },
         addFormRules:{
             attr_name:[{required:true,message:'请输入参数名称',trigger:'blur'}]
         },

         editDialogVisible: false,

         editForm:{
             attr_name:''
         },
        //  修改表单的验证规则
         editFormRules:{
              attr_name:[
          { required: true, message: '请输入名称', trigger: 'blur' }
        ]
         },
         inputVisible:false,
         inputValue:''

    
     }
 },
 created(){
     this.getCateList()
 },
 methods:{
    async getCateList(){
        const {data:res} = await this.$http.get('categories')
        if(res.meta.status !== 200){
            return this.$message.error('获取商品分类失败')
        }
        this.catelist = res.data
        console.log(this.catelist)
     },
     handleChange(){
        this.getparamsData()
     },
     handleTabClick(){
         console.log(this.activeName)
         this.getparamsData()
     },
     async getparamsData(){
        //  console.log(this.selectedCateKeys)
         if(this.selectedCateKeys.length !== 3) {
             this.selectedCateKeys = []
             this.manyTableData =[]
             this.onlyTableData =[]
             return
         }
         console.log(this.selectedCateKeys)
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
             params:{sel:this.activeName}
         })
         if(res.meta.status !== 200) {
             return this.$message.error('获取参数列表失败')
         }

         res.data.forEach(item=>{
             item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
             item.inputVisible = false
             item.inputValue = ''
         })
         console.log(res.data)
         if(this.activeName === 'many') {
             this.manyTableData = res.data
         } else {
             this.onlyTableData = res.data
         }
     },
     addDialogClosed(){
         this.$refs.addFormRef.resetFields()
     },
     addParams(){
         this.$refs.addFormRef.validate(async valid=>{
             if(!valid) return
             const {data:res} = await this.$http.post(`categories/${this.cateId}/attributes`,{
                 attr_name:this.addForm.attr_name,
                 attr_sel:this.activeName
             })
             if(res.meta.status !== 201) {
                 return this.$message.error(添加参数失败)
             }
             this.$message.success('添加参数成功')
             this.addDialogVisible = false
             this.getparamsData()
         })
     },
    //  点击按钮显示修改的对话框
    async showEditDialog(attr_id){
        // 查询当前参数的信息
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,
      {params:{ attr_sel:this.activeName }})
      if(res.meta.status !== 200){
          return this.$message.error('获取参数数据失败')
      } 
      //吧获取的新参数赋值到
        this.editForm = res.data;
      //显示修改参数.属性对话框
      
         this.editDialogVisible=true
     },
     editDialogClosed(){
         this.$refs.editFormRef.resetFields()
     },
    //  点击按钮修改参数
     editParams(){
         this.$refs.editFormRef.validate(async valid=>{
             if(!valid) return 
             const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
        {attr_name:this.editForm.attr_name,attr_sel:this.activeName})
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数数据失败')
        }
        this.$message.success('修改' + this.titleText + '数据成功')
        this.editDialogVisible = false
        this.handleChange();
         })
     },
    //  根据id删除数据
     async removeParams(attr_id){
          const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        if(confirmResult !== 'confirm') {
            return this.$message.info('已经取消删除')
        }
        const {data:res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除参数数据失败')
        }
        this.$message.success('删除数据成功')
        this.getparamsData()
     },
     async handleInputConfirm(row){
         row.inputVisible = !row.inputVisible
         if(row.inputValue.trim().length === 0) {
             row.inputValue = ''
             return
         }
        //  失去焦点时,若内容不为空,将内容渲染到页面中
         row.attr_vals.push(row.inputValue.trim())
         row.inputValue = ''
        this.saveAttrVals(row)
     },
    //  将数据保存到数据库
     async saveAttrVals(row){
         const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
             attr_name: row.attr_name,
             attr_sel: row.attr_sel,
             attr_vals: row.attr_vals.join(' '),
         })
         if(res.meta.status !== 200){
          return this.$message.error('获取参数数据失败')
      } 
      this.$message.success('成功')
     },
     showInput(row){
         row.inputVisible = true
        //  文板框自动获取焦点
         this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
     },
     handleClose(i,row){
         row.attr_vals.splice(i,1)
        this.saveAttrVals(row)
     }
 },
 computed:{
     isBtnDisabled(){
         if(this.selectedCateKeys.length !== 3) {
             return true
         }
         return false
     },
     cateId(){
         if(this.selectedCateKeys.length === 3) {
             return this.selectedCateKeys[2]
         }
         return null
     },
     titleText(){
         if(this.activeName === 'many'){
             return '动态参数'
         }
         return '静态参数'
     },
 }
}
</script>

<style lang="less" scoped>
 .cat_opt{
     margin: 15px 0;
 }
 .el-tag{
     margin: 10px;
 }
 .input-new-tag{
     width: 120px;
 }
 
</style>
